Introduce intercepting and handling devtools messages in the renderer.

content/browser/devtools/renderer_overrides_handler.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_DEVTOOLS_RENDERER_OVERRIDES_HANDLER_H_
+#define CONTENT_BROWSER_DEVTOOLS_RENDERER_OVERRIDES_HANDLER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/browser/devtools/devtools_protocol.h"
+
+namespace content {
+
+class DevToolsAgentHost;
+
+// Overrides Inspector commands before they are sent to the renderer.
+// May override the implementation completely, ignore it, or handle
+// additional browser process implementation details.
+class RendererOverridesHandler : public DevToolsProtocol::Handler {
+ public:
+  explicit RendererOverridesHandler(DevToolsAgentHost* agent);
+  virtual ~RendererOverridesHandler();
+
+ private:
+  scoped_ptr<DevToolsProtocol::Response> GrantPermissionsForSetFileInputFiles(
+      DevToolsProtocol::Command* command);
+
+  DevToolsAgentHost* agent_;
+
+  DISALLOW_COPY_AND_ASSIGN(RendererOverridesHandler);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_DEVTOOLS_RENDERER_OVERRIDES_HANDLER_H_